James whitblaw



ill liilllllllllllllllll-llllllllllfl Inveni g Machmes Patented Dec. 7, I880.

J. WHITELAW. Melting. Pot for Type Gastin (No Model.)

Artie-st."

UNITED STATES PATENT OFFICE.

JAMES WHITELAW, OF ST. LOUIS, -MISSOURI, ASSIGNOR OF ONE-HALF TO ST. LOUIS TYPE FOUNDRY, OF SAME PLACE.

MELTlNG-POT FOR TYPE-CASTING MACHINES.

SPECIFICATION forming part of Letters Patent No. 235,188, dated December '7, 1880.

Application filed October 6, 1880. (No model.)

To all whom it may concern:

Be it known that I, JAMEs WHITELAW, of St. Louis, in the State of Missouri, have invented certain new and useful Improvements in Melting-Pots for Type-Casting Machines, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, making part of this specification.

My improvement consists in the described construction of pot and flue by which the nipple and the metal in proximity to it is kept at ahigh temperature and the flue passes through the body of the melted metal.

In the drawings, Figure 1 is a top view, with part of the flue broken away to show its connection with the fire-chamber. Fig. 2 is a vertical section at .10 a", Fig. 1. Fig. 3 is a vertical section at x m, Fig. 1.

A is the furnace-base. B is the furnace or fire-pot, upon which the melting pot or kettle is supported.

The melting-pot consists of a single casting, including a vessel, G, to contain the melted type-metal, and a flue, D, which is, in the main, concentric with the pot.

The openings from the fire-chamber B to the flue are shown at d. It will be seen that openings d are at the part of the fire-chamber most remote from the mouth b of the same, and consequently the hottest part of the chamber B, and in proximity to the jet-nipple E, so that the metal at the nipple is kept at a high temperature, more especially as the supply-duct 0, leading from the well to the nipple, passes through the body of iron 0, forming the top of the fire chamber at that part. From the entrances d the products of combustion pass through the curved parts of the flues D to the chimney F.

It will be seen that there is only a thin space for the melted metal between the bottom and sides of the fines D and pot (3, as the flues nearly fill the pot, the flues being carried through the body of melted type-metal. It follows that the metal may bekept at a sufficiently high temperature with the expenditure of a minimum supply of artificial heat from the furnace, and that the pot requires but a small quantity of type-metal to fill it to a working height. The result of the former advantage is the saving of fuel and fire-space. The latter advantage, which is of more importance, lessens the deterioration of the type-metal, for it is well known that alloys, while in a melted condition, are liable to separate into their constituents, and as a smaller quantity of metal calls for more frequent renewal, the metal will be for a shorter period subject to degeneration.

G is the pump-cylinder. H is the well. 1 is the valve-rod, which,by its lateral movements, opens and closes the nipple andjet-hole, and the supply of metal is thus let on or out off at the inner end of the nipple-chamber. It is not necessary to further describe the action of the parts G H I, as I claim no novelty in them.

I claim as my invention- The melting-pot for type-casting machines, having a vessel, 0, for the molten metal, and return flue or flues D, opening into the part of the fire-chamber in proximity to the nipple E, and extending through the molten metal.

JAMES WHITE LAW.

Witnesses SAML. KNIGHT, JAMES G. PAVYER. 

